body {
  margin: 0;
  padding: 0;
  background-color: #ffffff;
  font-size: 14px;
  font-family: 'Microsoft YaHei', 'Times New Roman', Times, serif;
  letter-spacing: 0;
  color: #333333;
}
.select-box {
  
  position: relative;
  height: 40px;
  line-height: 40px;
  border: #999999 solid 1px;
  color: #666666;
  user-select: none;
  font-size: 16px;
}
.select-box>span{
  position: absolute;
  display: block;
  width: 0;
  height: 0;
  border-right: 6px solid transparent;
  border-left: 6px solid transparent;
  border-top: 6px solid #999999;
  right: 10px;
  top: 17px;
  cursor: pointer;
}
.select-box>input{
  height: 35px;
  border: none;
  padding: 0 15px;
  outline: none;
}
.select-box:focus{
  border: 1px solid red;
}
.select-box>ul {
  cursor: pointer;
  margin: 0;
  padding: 0;
  list-style: none;
  position: absolute;
  width: 100%;
  max-height: 270px;
  border: #E2E2E2 solid 1px;
  left: -1px;
  top: 41px;
  display: none;
  background-color: #ffffff;
  z-index: 1;
  font-size: 14px;
  overflow-y: scroll;
}
.select-box>ul::-webkit-scrollbar {
    width: 10px;
    background-color: #F5F5F5;
} 
.select-box>ul::-webkit-scrollbar-thumb {
    background-color: #EF7836;
}
.select-box>ul::-webkit-scrollbar-track {
    background-color: #F5F5F5;
}
.select-box>ul>li {
  margin: 0;
  height: 50px;
  line-height: 50px;
  padding: 0 15px;
}
.select-box>ul>li:first-child {
  border-top: none;
}
.select-box>ul>li:hover {
  background-color: rgba(242,242,242,1);
}